Locomotive-whistle amplifier



D. LINDSAY LOCOMOTIVE WHISTLE AMPLIFIER 7 Filed April 10, 1926 INVE OR ATTORNEY iaz/i'ddzhds a Patented Nov. 22, 1927.

warren "stares navrn rinnsav, or oUIsvILLn, KENTUCKY.

LOGOMOIIVE'WHISTLE AMPLIFIER.

Application filed April'lO, 1926 Serial No. 101,167.

This invention relates to attachments for the whistles of locomotives and has for its object the provision of a novel sound directing hood structure whereby the sound of the locomotive may b projected forwardly in advance of the train and also rearwardly so as to give not only adequate signals to iraimnen and other interested parties along the road, but also to warn motorists and others at crossings whereby to prevent ac-- :idents.

It is well known that the ordinary type of locomotive whistle sends out the sound in all directions, the sound at the sides being objectionable whereas the sound at the front and rear is at present totally inadequate in asmuch as it does not carry far enough or loud enough to be heard especially by motorists in closed cars.

It is with the above facts in view that I have designed the present invention which has for a more specific object the provision of a casing adapted to be attached in encircling relation toan already existing locomotive whistle and provided with megaphone portions which will extend forwardly and rearwardly for concentrating the sound into the proper directions.

An additional object is the provision of an attachment of this character which will, be simple and inexpensive in manufacture, easy to apply, positive in action, efficient and durable in service, and a general improvement in the art.

l Vith the above and other objects and ad'- vantages in view, the invention consists in the details of construction and the arrangement of parts to be hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a plan View of the attachment applied to a locomotive whistle.

Figure 2 is a vertical section taken on the line 2-2 of Figure 1, and

Figure 3 is a similar view showing a slight modification in the structure.

Referring more particularly to the drawings, the letter A designates an ordinary locomotive whistle which, as is well known, is generally supported upon the steam pipe B which supplies pressure thereto for the purpose of operating it. The letter C designates the usual elbow which is provided.

In carrying out the invention, I provide a casing or hood structure 10 whichmay be of any suitable size, shape and material but which must be large enough to surround the whistl A in spaced relation thereto. This casing 10 may be mounted in any de sired manner as for instance in Figures 1 and 2 it is shown as having secured to its inner-periphery at its lower end a plurality of angular arm members 11 which are riveted or othe'wise suitably secured to a of the casing 10 at intermediate points in the length thereof are megaphones or fun nel members 17 of suitable length which of course communicate with the interior of the casing 10 through openings 18. r

In the operation, it will of course be apparent that the whistle acts in the usual manner but the sound therefrom will be directed forwardly and rearwardly of the train through the megaphones or funnel members 17, the sound being thus intensified and concentrated in the desirable directions and prevented from passing out to the sides where the use is undesired. Clearly, trainmen or the operators of othertrains in the rear will hear the signals and the same is true in the case of trains in advance. However, the principal feature of advantage is that at railroad crossings the occupants of automobiles, especially closed cars, will be enabled to hear the'warning signal so that they will not attempt to cross the tracks in the path of a train. It is really believed that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.-

While I have shown and described the preferred embodiment of the invention, it should be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claim.

Having thus described the invention, I claim A sound amplifying attachment for a locomotive Whistle, the Whistle including an upstanding pipe carrying the Whistle and having an operating lever pivotally mounted upon the pipe beneath the Whistle, the attachment comprising an open topped cylindrical casing disposable about the whistle in spaced relation thereto, said casing having a slot therein for the accommodation of said lever, a cuff vertically adjustably clamped upon the whistle supporting pipe and connected with the bottom of the casing,

and oppositely arranged megaphone mem-- bers carried by the casing and communicating Wlth the interior thereof.

DAVID LINDSAY. 

